IC 417 and NGC 1931 in Auriga
IC 417 and NGC 1931 in Auriga
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CLICK ON IMAGE FOR FULL SIZE VIEW (2400x1800) Scope: FSQ-106N refractor at f/5, Location: Blair Valley, Anza Borrego Desert, CA 29 December 2013 Camera: ST8300M Exposure:
8 x 9 min (1x1 bin) exposure with UV/IR block, 10 x 12 min (2x2
bin) H-Alpha exposures, 8 x 5 min (2x2 bin) RGB
exposures.
Processing: Data
Collection - CCDSoft (as FITs). Calibrated, stacked (Sigma
Combine), L - Ha - RGB channel registration, equalization, central gradient removal -
Astroart. Curves, Levels, L - Ha - RGB combine and finishing - Photoshop.
Final color Calibration with eXcalibrator. This image is UV/IR Block and Ha
blend for the Luminance channel and then a LRGB
combine with Luminance layering. Final Image size is
approximately 3352x2532 resized to 2400x1800. North is up in this
image. North is up
in NGC 1931 is the small bright nebula in the lower left; the larger
nebula in the upper right is IC 417 (also known as Sharpless 234). The field in this image is sometimes called the "Spider and
the Fly". Here the spider is IC 417 and the fly is NGC 1931. This field is
located in the Constellation of Auriga. IC 417 is known to be a star
forming region with embedded star cluster. Both objects are
emission/reflection nebulas. As a size reference,
NGC 1931 is about 10 light year across. IC 417 is about 7,500 light years
distant from Earth; NGC 1931 is about 7,000 light years distant. An earlier image of IC
417 can be seen here. Horizontal FOV is 115'
Image center is approximately - Equatorial 2000: RA: 05h 29m 23s Dec: +34°29'32"
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